#include<stdio.h>
char* css(char* a,const char* b)
{
	char* c=a;
	while(*b!='\0')
	{
		*a=*b;
		a++;
		b++;
	}
	return c;
}
int main()
{
	char a[1000];
	char b[]="hello,word";
	css(a,b);
	printf("%s",a);
	return 0;
} 
